Q60Secure Network Access, Visibility, and Enforcement
Refer to the exhibit. A network engineer is testing NTP authentication and discovers that any device can synchronize its time with this router and that NTP authentication is not enforced. What is causing this issue?
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Discussion · 2
8
The example below shows how to configure the system so it synchronizes only to systems that provide authentication keys 1 to 3 in their NTP packets:
Router(config)# ntp authenticate
Router(config)# ntp authentication-key 1 md5 key1
Router(config)# ntp authentication-key 2 md5 key2
Router(config)# ntp authentication-key 3 md5 key3
Router(config)# ntp trusted-key 1 - 3
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-cr-book/bsm-cr-n1.html#wp2849112306
ntp authenticate - Enables NTP authentication.
3
It's C, we need to put the command ntp authentication enable